Fish descent

Substructure

Mounting frame

Maintenance gangway

Fish ladder

Belt capstan

Fish discharge chute

Compensation water protection

Generator works

Cover/housing

Control system

Seals

The technical components

1. Hydraulic steelwork

The steel welded construction with continuously welded screw blades ensures high stability. Its solid construction and generous use of material ensure a long service life. The gap-free design makes injury-free fish ascent possible.

2. Substructure

The environmentally and fish friendly HYDROCONNECT ascent screw is installed in a concrete structure or steel frame. The design is very thin and therefore only requires a small amount of concrete and space.

3. Fish ladder and attraction current

The fish transport is based on Archimedes’ principle: Fish are raised effortlessly upstream in the standing water of the screw chamber.

special shape of the screw blades to create an optimised guiding current

bottom connection for weak swimming fish such as the bullhead, for example

4. Mounting

5. Generator works

Variable rotation speeds can be used through the implemented frequency converter technology

6. Fish discharge chute

chute to transport the individually ascended fish into the calm headwater

minimum slope

can be disassembled

7. Compensation water protection

Steel protection for regulating the amount of compensation water

Compensation of headwater level fluctuations

Seasonally dependent compensation water quantities

Fish descent possible

For bigger locations, the water can be used as a guiding current

The compensation water protection is controlled by level sensors and water quantity specifications

8. Cover/housing

If, due to the place of use, there is a need for a cover, then it can be realised using wood, glass, stone, concrete or other materials. The belt capstan and generator works are covered as a standard feature for safety and protection against external environmental influences. Generally, no complete covering of the system is necessary.